模型参数扰动对模型预测控制的影响分析

Analysis of Influence for Model Parameter Disturbance on Model Predictive Control

由于模型参数不匹配对有限集模型预测控制(FCSMPC)的控制性能存在影响,对此提出了一种分析方法,用于研究模型参数扰动对FCSMPC的影响,其中研究对象为三相逆变器的模型预测电流控制。分析结果显示,预测误差不仅取决于参数不匹配,还取决于当前负载电流和逆变器输出电压的瞬时值。结合传统线性电流控制器,对模型中负载电阻和电感参数扰动对FCSMPC的影响开展了实验研究,结果表明参数扰动对FC⁃SMPC稳态控制性能影响显著,但FCSMPC的瞬态响应受参数扰动的影响较小,优于传统的线性电流控制器。

Since the model parameter mismatch had an impact on the control performance of finite-control-set model predictive control(FCSMPC),an analytical method was proposed to research the influence of model parameter perturbation on FCSMPC.And the research object was the model predictive current control of the threephase inverter.The analysis results show that the prediction error not only depends on the parameter mismatch,but also depends on the instantaneous value of the current load current and the inverter output voltage.Experimental research on the influence of load resistance and inductance parameter disturbance on FCSMPC in the model was carried out in combination with the traditional linear current controller.The results show that the parameter disturbance has a significant influence on the steady-state control performance,but the transient response is less affected by the parameter disturbance,which is superior to traditional linear current controllers.